From e9f3fb523dbf476dc86beea23f5b5ca8f9687c93 Mon Sep 17 00:00:00 2001
From: Samuel Holland <samuel@sholland.org>
Date: Sun, 24 Apr 2022 18:17:50 -0500
Subject: [PATCH] mmc: sunxi-mmc: Fix DMA descriptors allocated above 32 bits
Git-commit: e9f3fb523dbf476dc86beea23f5b5ca8f9687c93
Patch-mainline: v5.18-rc6
References: git-fixes
Newer variants of the MMC controller support a 34-bit physical address
space by using word addresses instead of byte addresses. However, the
code truncates the DMA descriptor address to 32 bits before applying the
shift. This breaks DMA for descriptors allocated above the 32-bit limit.
Fixes: 3536b82e5853 ("mmc: sunxi: add support for A100 mmc controller")
Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220424231751.32053-1-samuel@sholland.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/mmc/host/sunxi-mmc.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/host/sunxi-mmc.c b/drivers/mmc/host/sunxi-mmc.c
index c62afd212692..46f9e2923d86 100644
--- a/drivers/mmc/host/sunxi-mmc.c
+++ b/drivers/mmc/host/sunxi-mmc.c
@@ -377,8 +377,9 @@ static void sunxi_mmc_init_idma_des(struct sunxi_mmc_host *host,
pdes[i].buf_addr_ptr1 =
cpu_to_le32(sg_dma_address(&data->sg[i]) >>
host->cfg->idma_des_shift);
- pdes[i].buf_addr_ptr2 = cpu_to_le32((u32)next_desc >>
- host->cfg->idma_des_shift);
+ pdes[i].buf_addr_ptr2 =
+ cpu_to_le32(next_desc >>
+ host->cfg->idma_des_shift);
}
pdes[0].config |= cpu_to_le32(SDXC_IDMAC_DES0_FD);
--
2.31.1